I just had a Thermann 26L/m continuous natural gas hot water unit installed today. My water pressure at the mains is 75psi before installation and I don't have any water saving heads in the home. So no problem with water pressure. When the plumber left and I got a chance to use it, I noticed it takes a good 30-45 seconds to go from cold water to luke warm and then rises to 50 degrees after a minute. My hand basin is on level ground less than 5m away. My kitchen about 10-12m away was worse. I turned the hot water on and had to wait over a minute...Read more

Just had a Thurmann 26 installed to replace our 10-year-old Rinnai. Heat exchanger in the Rinnai sprung a leak and it was not economical to replace and Rinnai one we're not interested even though it was just over 10 years old and out of warranty and 2. it was going to take them a week at least to get a servicemen to look at it. We had our Thurmman from All blocks Plumbing replaced within 2 days. The Thurmman has a great warranty and the best bit is you don't need to call the company to get their service agent out to look at it, the plumber who ...Read more

I made an impulsive decision to replace a 25 year old electric storage hot water system with new Thermann gas continuous flow hot water unit. Didn’t bother to research the options and relied entirely on my Plumber whose advice I normally value.
A major downfall with the Thermann unit is one which, from other product reviews, I should have realised prior to its purchase. Whilst the Thermann unit adequately provides continuous hot water for use in kitchen and laundary, it cannot be relied upon to supply continuous hot water to a shower without...Read more

The Thermann 26 requires a a large volume of water to make it work so it won't work with water saving shower heads which is quite unbelievable in this day & age. It is not possible to close the hot water tap much to reduce flow & temperature as the gas cuts out, as it does if you turn the cold up much. As it is heating a large volume of water all the time to what I consider too high a temperature then it must by definition be using a lot of gas which is borne out by the fact that we now have VERY large gas bills and in a home with only two peo...Read more

I purchased the model Thermann GCF 26 6 star Model when the 320 Litre solar powered gave up in 3 plus few months. I am glad I purchased this unit. Had I repaired other unit it was on its last leg with corrosion on the bottom of the water tank. This unit was recommended by the installing plumber. Did some research on this forum & forked out $1100 for the unit.
Pros. Works well. We are 3 people family unit & we tend to take quick showers even with a teen in the house. Takes about 30-40 seconds on coldest days to get the hot water going. T...Read more

With electricity prices going through the roof, I recently made the decision to dump electricity in favour of gas. Being rural, I had to increase the size of the line from my LPG tanks to carry the larger gas flow so that the two showers in my home could be used at the same time. The install was made quickly and the over large electric storage tank was removed (so much more space now). I am more than happy with the results and the continuous hot water never runs out (unless the LPG tank does).
I have waited several months to write this review ...Read more

This is the worst system in the world. If only there was an option to give it zero.
I got a plumber to install the system about 4 months ago and has not worked properly from day one.
3 mins in to a shower the system will stop making hot water and I will have to wait another 3 months until it heats up. Rang up the company who advised me that my gas meter was too small and needed to be upgraded. The meter was upgraded, cost me $500 and still the same problem. I know this was a lie, because my sister has a rinnai with a small meter and not one...Read more